首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   10849篇
  免费   653篇
  国内免费   283篇
耳鼻咽喉   128篇
儿科学   89篇
妇产科学   228篇
基础医学   711篇
口腔科学   341篇
临床医学   1723篇
内科学   1666篇
皮肤病学   127篇
神经病学   349篇
特种医学   496篇
外国民族医学   1篇
外科学   2969篇
综合类   967篇
预防医学   639篇
眼科学   205篇
药学   579篇
  3篇
中国医学   207篇
肿瘤学   357篇
  2024年   19篇
  2023年   169篇
  2022年   274篇
  2021年   409篇
  2020年   372篇
  2019年   384篇
  2018年   393篇
  2017年   320篇
  2016年   378篇
  2015年   339篇
  2014年   699篇
  2013年   650篇
  2012年   509篇
  2011年   585篇
  2010年   486篇
  2009年   491篇
  2008年   506篇
  2007年   539篇
  2006年   454篇
  2005年   372篇
  2004年   338篇
  2003年   317篇
  2002年   238篇
  2001年   243篇
  2000年   138篇
  1999年   166篇
  1998年   126篇
  1997年   141篇
  1996年   155篇
  1995年   112篇
  1994年   120篇
  1993年   126篇
  1992年   121篇
  1991年   143篇
  1990年   110篇
  1989年   98篇
  1988年   119篇
  1987年   79篇
  1986年   91篇
  1985年   84篇
  1984年   80篇
  1983年   65篇
  1982年   52篇
  1981年   48篇
  1980年   64篇
  1979年   14篇
  1978年   12篇
  1977年   7篇
  1976年   7篇
  1974年   7篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
儿童处于生长发育特殊阶段,其颌面部解剖结构、牙列情况及心理状态与成年人有明显区别。颌面部骨折患儿常出现面部发育畸形、张口受限、咬合关系紊乱等,严重影响患儿的日常生活。因此,儿童颌面部骨折的诊疗一直是临床上的难题,也是国内外的研究热点。颌面部骨折好发于青少年,损伤原因多为意外跌倒、交通伤及运动伤。近年来,数字化外科技术为儿童颌面部骨折提供精确的诊断及微创的治疗。国内外学者对于儿童颌面部骨折治疗理念逐渐倾向于手术治疗,选择可吸收材料对儿童颌面部骨折进行固定,降低对儿童面部发育的影响。长期随访对于儿童颌面部骨折患儿具有重要意义,有助于监测患儿面部发育情况。此外,临床医生应注意患儿的心理状态。对于创伤较重或发现有心理问题的患儿,应尽早干预治疗。文章就近年儿童颌面部骨折流行病学特点、诊断、治疗原则及伴发的心理问题做一综述。  相似文献   
2.
IntroductionMore than five million children have been conceived by assisted reproductive techniques (ART) around the world. Most authors agree that there are no differences in psychomotor development in comparison to naturally conceived children. However, these results are still contradictory.ObjectiveTo determine whether children born from a cohort of ART-clinical gestations have a higher risk of suffering neurodevelopmental disorders in comparison to a control group. The potential associated ART-factors associated were also determined.Material and methodsThe study included the assessment of children up to 3 years old conceived by ART, and born from a cohort of women treated by the reproduction unit of a public hospital from May 2012 to May 2014. A simultaneous assessment was made of matched controls, by following the newborn naturally conceived after the ART-case, of the same group of maternal age, gestational age, and type of gestation.ResultsThere were 243 clinical gestations and 267 ART-newborns, of which 231 were assessed (87%). A simultaneous assessment was carried out in 208/230 controls (90%). There were no differences in neurodevelopmental disorders (global developmental delay, autism spectrum or language delay). Multivariate analysis of potential ART factors only showed an association between transfer of frozen embryos with language delay that has not been previously described.ConclusionsThere were no differences between groups after adjusting the results according to maternal age, multiple pregnancy, and other possible confounding factors, supporting that the role of these factors may be more relevant than the ART itself. The association between frozen embryo transfer and language delay has not been previously described. Thus, more studies are needed to confirm or refute this relationship.  相似文献   
3.
This article was designed to provide a pediatric cardiac computed tomography angiography (CCTA) expert panel consensus based on opinions of experts of the Société Française d’Imagerie Cardiaque et Vasculaire diagnostique et interventionnelle (SFICV) and of the Filiale de Cardiologie Pédiatrique Congénitale (FCPC). This expert panel consensus includes recommendations for indications, patient preparation, CTA radiation dose reduction techniques, and post-processing techniques. The consensus was based on data from available literature (original papers, reviews and guidelines) and on opinions of a group of specialists with extensive experience in the use of CT imaging in congenital heart disease. In order to reach high potential and avoid pitfalls, CCTA in children with congenital heart disease requires training and experience. Moreover, pediatric cardiac CCTA protocols should be standardized to acquire optimal images in this population with the lowest radiation dose possible to prevent unnecessary radiation exposure. We also provided a suggested structured report and a list of acquisition protocols and technical parameters in relation to specific vendors.  相似文献   
4.
5.
6.
Chronic pain in the UK affects up to 43% of the population. The consequences include physical and psychological distress, loss of function, employment, family and social strain and increased utilization of healthcare services. Modern pain management services operate across primary, secondary and tertiary care and incorporate general practitioners, psychologists, physiotherapists, pharmacists, specialist nurses, pain physicians and surgeons. This allows for a coordinated approach to chronic pain, engaging the patient in a structured pathway from conservative measures, through to surgery if necessary. Surgical interventions have been utilized effectively throughout the 20th century for the treatment of a variety of conditions, some of which are now effectively managed with improved pharmacological approaches or novel neuromodulation techniques. Ablative procedures that aim to permanently interrupt the pain pathway still represent the final solution for some conditions, particularly those with cancer associated pain; however, the search for less invasive, less risky measures continues. This is stimulated by an increased understanding of the neurobiology of pain transmission and the physiological changes which occur in persistent pain.  相似文献   
7.
8.
9.
10.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号